US2734366A - Washing machines - Google Patents

Washing machines Download PDF

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Publication number
US2734366A
US2734366A US2734366DA US2734366A US 2734366 A US2734366 A US 2734366A US 2734366D A US2734366D A US 2734366DA US 2734366 A US2734366 A US 2734366A
Authority
US
United States
Prior art keywords
pump
container
motor
liquid
impeller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication date
Priority claimed from GB26005/50A external-priority patent/GB701977A/en
Application granted granted Critical
Publication of US2734366A publication Critical patent/US2734366A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F17/00—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid
    • D06F17/06—Washing machines having receptacles, stationary for washing purposes, wherein the washing action is effected solely by circulation or agitation of the washing liquid by rotary impellers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation arrangements
    • D06F39/085—Arrangements or adaptations of pumps
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump

Definitions

  • a washing machine includes a container for washing liquid, an impeller in the container, a driving motor for the impeller, and, for emptying the container, a pump of centrifugal or other non-positive type permanently connected to the driving motor of the impeller, and means for closing the passage for liquid to or from the pump, to prevent undesired emptying.
  • the outlet from the pump may be connected to a flexible pipe having a storage position in which its free end is closed by a hung fixed to the machine, thereby preventing delivery from the pump.
  • Such an arrangement enables a single driving motor to be employed for driving the impeller as well as for driving the pump for emptying the container, and avoids the provision of a clutch or other means for disconnecting the pump.
  • the pump rotates, but since the passage for liquid is closed it imparts no energy to the liquid, and the power wasted in circulating the liquid is unimportant.
  • the pump may be designed with large clearancesso that the power required is a minimum when delivering no liquid, bearing in mind that the efiiciency when delivering liquid is unimportant.
  • the pump shaft is preferably insulated from the motor shaft, for example the shafts of the pump and motor may be parallel and for transmitting the drive may carry cooperating friction Wheels whereof at least a part of at least one is of insulating material.
  • the pump body may be supported by the motor body but insulated from it, for example the pump body may be formed at least partly of insulating material having an arm moulded integrally with it by which it is connected to the motor body.
  • the washing impeller may be connected to the driving motor through a clutch. This may be advantageous if it is found that the rotation of the impeller causes undue lathering of the liquid when the container is partially empty. In general, however, this lathering is only objectionable when the container contains clean water and soap and does not arise after one or two loads of clothes have been washed in the liquid. Since the container will normally only be emptied when the liquid has been used and its washing effectiveness is exhausted the difliculty is not likely to be a serious one, and in this case, in the interests of simplicity, the impeller may be permanently connected to the driving motor.
  • the machine may be provided with a combined filling and extension emptying hose of sufficient diameter to fit loosely over ordinary taps and allow water to flow down it fast enough not to overflow, and also to fit over the delivery pipe to form an extension of it.
  • ' Figure 4 is a view of a combined filling and extension.
  • the washing machine comprises a generally rectangular container A having a pair of vertical side walls A and A a pair of vertical end walls A and A*, a substantially horizontal bottom wall A extending from one end wall A to about the middle of the container, and a sloping wall A extending to the other end wall.
  • Recessed into one of the vertical side walls A is a disc-like impeller B having six smoothly curved radial ribs B projecting from its face.
  • Beneath the container and enclosed by an outer container or shroud C is an electric driving motor D hav- The pulley D is provided with a belt D through which it drives another pulley B mounted on the shaft of the impeller B.
  • the motor shaft D also carries a friction wheel D for driving a centrifugal emptying pump B.
  • this comprises a casing E containing a centrifugal impeller E on a shaft E carried in suitable bearings mounted in an end plate E and having at its outer end a friction wheel E
  • the pump casing is provided with an arm E bolted to a lug D formed on one of the end frames of the motor so as to support the pump in such a position that the periphery of the friction wheel E engages that of the friction wheel D on the motor shaft.
  • the only metal main parts of the pump are the shaft E which is of stainless steel, and the end plate E which is an aluminium casting.
  • the impeller E is of synthetic resin moulded on to the shaft
  • the casing E is of synthetic resin having the arm E moulded integrally with it
  • the friction wheel E is also of synthetic resin moulded on to a metal hub.
  • synthetic resin mouldings for the easing and impeller affords smooth surfaces which tend to improve efficiency and avoid collecting lint.
  • the arrangement also removes the pump from the immediate vicinity of the motor so that if any liquid should leak from the pump it .will escape on to the floor and not into the motor.
  • the arrangement also enables the pump to be driven at a higher speed than the motor and hence to be of reduced size.
  • the speeds of the pump, motor and washing impeller may be respectively about 2100 R. P. M., 1400 R. P. M. and 530 R. P. M.
  • the spokes of the friction wheel D may be formed as fan blades, preferably to supplement a main fan at the other end of the motor, especially if, in the interests of reliability, a shaded pole motor is employed.
  • the bottom of the container is provided with a sump F into which the liquid will drain and from which it can be drawn through a suction pipe F communicating with the inlet to the pump.
  • the sump has a perforated cover F flush with the bottom of the container.
  • the delivery outlet of the pump is connected by a delivery pipe G through a union G to a further delivery pipe G
  • the de- 7 3 livery pipe G is shown in Figure 2 in its storage position in which it extends from the union G to a mounting block G affording a solid bung G which in this position blocks the end of the delivery pipe.
  • the delivery pipe G has a circumferential ring or rib G moulded or bonded round it' to cooperate with a combined filling and extension emptying pipe H.
  • the diameter'ot the latter is large, so that for filling the container it can be fitted loosely over any ordinary tap or faucet, somewhat in the manner of a funnel, and so that in normal circumstances the water will flow away down it and not overflow even though the tube is a loosefiton the tap.
  • a ring H surrounding the end of the pipe H carries a chain H which can be looped or wound round the tap to hold the pipe in position.
  • the chain H is looped around the tap with one end of pipe H loosely receiving the fluid discharge portion of the tap and the other end thereof extending into the container A to discharge water thereinto.
  • the end of the pipe G can be pushed into the extension pipe H as shown, and the ring G will provide a watertight joint even if the pipe G is of ribbed type.
  • the ring G may have a tapered surface to facilitate pushing it into the extension pipe H.
  • the extension pipe H has an internal diameter of one inch while the outside diameter of the delivery pipe G is A; of an inch or less.
  • the extension pipe H may be moulded or otherwise shaped with cranked or inclined ends as shown at H and H to enable these ends more easily to fit over a tap and into the container without buckling.
  • union block G and mounting block 6 also serve as supports for a wringer N which is pivoted to them so that it can be folded down into the container in known manner when not in use.
  • pulley D may be mounted freely on the motor shaft and driven by it through a clutch.
  • a washing machine having a container for washing liquid, an impeller in the container and a drive motor for the impeller, the combination of a fluid pump having a liquid inlet connected to drain said container and a discharge outlet, said pump having relatively movable fluid pumping members separated by clearances sutficient to allow operation of said pump when said outlet is closed, means forming a permanent driving connection between said motor and said pump, a bung fixed to the machine, and a flexible conduit connected at one end to the outlet of said pump and having a storage position in which its free end is closed by said bung to prevent delivery of liquid from said pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US2734366D 1950-10-25 Washing machines Expired - Lifetime US2734366A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB902608X 1950-10-25
GB295024X 1950-10-25
GB1044033X 1950-10-25
GB26005/50A GB701977A (en) 1950-10-25 1950-10-25 Improvements relating to washing machines

Publications (1)

Publication Number Publication Date
US2734366A true US2734366A (en) 1956-02-14

Family

ID=27448676

Family Applications (1)

Application Number Title Priority Date Filing Date
US2734366D Expired - Lifetime US2734366A (en) 1950-10-25 Washing machines

Country Status (3)

Country Link
US (1) US2734366A (fr)
CH (1) CH295024A (fr)
FR (1) FR1044033A (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2279510A (en) * 1938-04-02 1942-04-14 Apex Electrical Mfg Co Washing machine
US2341894A (en) * 1941-01-09 1944-02-15 Gen Electric Washing machine
US2361767A (en) * 1939-12-04 1944-10-31 Jamestown Metal Equipment Comp Laundering machine
US2412078A (en) * 1943-06-04 1946-12-03 Westinghouse Electric Corp Washing apparatus
US2502965A (en) * 1944-05-18 1950-04-04 Solar Corp Clothes-washing machine
US2516656A (en) * 1946-04-18 1950-07-25 Maytag Co Washing machine having square tub and opposed impellers
US2538200A (en) * 1948-04-15 1951-01-16 Westinghouse Electric Corp Clothes-washing machine with suds control device
US2554672A (en) * 1950-05-10 1951-05-29 Westinghouse Electric Corp Clothes weighing door for washing machines
US2555725A (en) * 1947-11-13 1951-06-05 Apex Electrical Mfg Co Self-cleaning lint trap for washing machines

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2279510A (en) * 1938-04-02 1942-04-14 Apex Electrical Mfg Co Washing machine
US2361767A (en) * 1939-12-04 1944-10-31 Jamestown Metal Equipment Comp Laundering machine
US2341894A (en) * 1941-01-09 1944-02-15 Gen Electric Washing machine
US2412078A (en) * 1943-06-04 1946-12-03 Westinghouse Electric Corp Washing apparatus
US2502965A (en) * 1944-05-18 1950-04-04 Solar Corp Clothes-washing machine
US2516656A (en) * 1946-04-18 1950-07-25 Maytag Co Washing machine having square tub and opposed impellers
US2555725A (en) * 1947-11-13 1951-06-05 Apex Electrical Mfg Co Self-cleaning lint trap for washing machines
US2538200A (en) * 1948-04-15 1951-01-16 Westinghouse Electric Corp Clothes-washing machine with suds control device
US2554672A (en) * 1950-05-10 1951-05-29 Westinghouse Electric Corp Clothes weighing door for washing machines

Also Published As

Publication number Publication date
FR1044033A (fr) 1953-11-13
CH295024A (fr) 1953-12-15

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